Creating the Cheesy Sausage and Potatoes Casserole can be a fun and satisfying experience. Follow these simple steps to bring it to life:

1. Preheat Oven: Preheat your oven to 350°F (175°C).

2. Cook the Sausage: In a skillet, heat olive oil over medium heat. Add the sausage and cook until browned. Use a spatula to break it apart as it cooks. Once done, drain excess fat and set aside.

3. Prepare the Potatoes: In a large bowl, combine the diced potatoes, cooked sausage, and onion. Mix until evenly distributed.

4. Create the Sauce: In a separate bowl, whisk together the sour cream, milk, garlic powder, paprika, salt, and pepper until fully combined.

5. Combine Ingredients: Pour the sauce over the sausage and potato mixture. Stir thoroughly to ensure all the potatoes and sausage are coated.

6. Prepare a Baking Dish: Lightly grease a 9×13 inch baking dish. Spread the mixture evenly in the dish.

7. Add Cheese: Sprinkle the shredded cheddar cheese evenly over the top of the casserole.

8. Bake: Place the casserole in the preheated oven and bake for 45 minutes, or until the potatoes are tender and the cheese is bubbly and golden.

9. Cool: After baking, allow the casserole to sit for about 5-10 minutes before serving. This rest time will help the flavors meld beautifully.

10. Garnish: If desired, sprinkle chopped green onions over the top before serving for an added touch of flavor and color.

These straightforward steps will guide you in creating an incredible Cheesy Sausage and Potatoes Casserole that is sure to impress everyone at your table.